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Finding the Fourth Proportional to 195.71, 270.13 and 112.81

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Solution

The fourth proportional to 195.71, 270.13 and 112.81 is: 155.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    195.71 : 270.13 = 112.81 : x
  2. Step 2: Convert to fraction form
    195.71/270.13 = 112.81/x
  3. Step 3: Cross multiply
    195.71x = 270.13 × 112.81
  4. Step 4: Simplify right side
    195.71x = 30,471.91
  5. Step 5: Solve for x
    x = 30,471.91/195.71
  6. Step 6: Final answer
    x = 155.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.